Results 51 to 60 of about 7,095 (298)

Investigation of a low frequency coherent mode in Wendelstein 7-X with island divertor

Nuclear Fusion, 2023
During the island divertor operation of W7-X, especially in standard magnetic configuration (with 5/5 island chain in the scrape-off-layer (SOL)), quasi-periodic electromagnetic oscillation is observed.
H.M. Xiang, A. Krämer-Flecken, X. Han, T. Windisch, G. Weir, K. Rahbarnia, J. Schilling, H. Thomsen, S.vaz Mendes, A. Knieps, M. Vécsei, M. Otte, S. Zoletnik, G. Anda, D. Dunai, D. Zhang, P. Kornejew, J. Huang, T. Zhang, X.D. Lin, X. Gao, Y. Liang, the W7-X team   +22 more
doaj   +1 more source

Broadband, Continuous-Wave, Mid-Infrared Generation Based on TFBG Spectral Modulation

IEEE Photonics Journal, 2022
We demonstrated a tilted fiber Bragg grating (TFBG)-based modulated amplified spontaneous emission (ASE) source, followed by the broadband, continuous-wave (CW) mid-infrared laser generated by intracavity difference-frequency generation (DFG).
Kaifeng Wang, Xiao Li, Peng Wang, Meng Wang, Weihong Hua, Zefeng Wang, Kai Han   +6 more
doaj   +1 more source

Neuronal oscillations enhance stimulus discrimination by ensuring action potential precision

, 2006
Although oscillations in membrane potential are a prominent feature of sensory, motor, and cognitive function, their precise role in signal processing remains elusive.
Margrie, Troy W, Margrie, Troy W., Schaefer, A.T., Margrie Troy W, Margrie, T.W., Schaefer, A., Schaefer Andreas T, Spors, Hartwig, Angelo, K., Kamilla Angelo, Troy W Margrie, Angelo Kamilla, Margrie, T., Spors, H., Schaefer, Andreas T., Spors Hartwig, Andreas T Schaefer, Troy W. Margrie, Andreas T. Schaefer, Angelo, Kamilla, Hartwig Spors, Schaefer, Andreas T   +21 more
core   +1 more source

Skin‐Like Tri‐Modal Sensors Based on Soft Piezoelectric and Ionic Composites

Advanced Materials Technologies, EarlyView.
Inspired by the multimodal perception of human skin, a soft, skin‐like tri‐modal sensor is presented. The device incorporates an ionically conductive, piezoelectric, elastic composite as its active layer, enabling independent detection of temperature, static strain, and dynamic strain within a single two‐terminal architecture.
Liren Wang, Peter Zalar, Vishva Bhate, Takeo Furukawa, Hidekazu Kodama, Yijun Liu, Yuanyuan Zhou, Chuang Hou, Siyuan Liu, Naoji Matsuhisa   +9 more
wiley   +1 more source

Analysis of Wideband Oscillation Mechanism and Suppression Technology Based on C-Type Damping Filter

Energies
Based on the dilemma of analyzing the resonance stability of AC power grids using impedance models, it is demonstrated that the “negative resistance” mechanism of wideband oscillation is untenable. A general method for describing power electronic devices
Zheng Xu
doaj   +1 more source

Acoustic frequency atomic spin oscillator in the quantum regime

Nature Communications, 2023
Quantum noise reduction and entanglement-enhanced sensing in the acoustic frequency range is an outstanding challenge relevant for a number of applications including magnetometry and broadband noise reduction in gravitational wave detectors.
Jun Jia, Valeriy Novikov, Tulio Brito Brasil, Emil Zeuthen, Jörg Helge Müller, Eugene S. Polzik   +5 more
doaj   +1 more source

Coupling of Er3+ ions and Plasmonic Modes in Vertical Nanocavities for Spectral Broadening in Telecom Bands

Advanced Materials Technologies, EarlyView.
Left: Illustration of the glass & nanostructures system and the NIR emission at 1.5 µm, where the colored spheres represent the Er3+ ions within the doped glass. Right: Representation of the Stark splitting of the 4I13/2 and 4I15/2 manifolds of the Er3+, illustrating how the plasmonic modes facilitate the emission from the broader Stark manifold ...
Gaston Lozano Calderón, Víctor Anthony García Rivera, Stéphan Cagnon, Souleymane Toubou Bah, Younès Messaddeq, Euclydes Marega Junior   +5 more
wiley   +1 more source

Quasi-90-day oscillation observed in the MLT region at low latitudes from the Kunming meteor radar and SABER

Earth and Planetary Physics, 2019
Observations of a quasi-90-day oscillation in the mesosphere and lower thermosphere (MLT) region from April 2011 to December 2014 are presented in this study. There is clear evidence of a quasi-90-day oscillation in temperatures obtained from the Kunming
Wen Yi, XiangHui Xue, JinSong Chen, TingDi Chen, Na Li   +4 more
doaj   +1 more source

Ultra-broadband pulse evolution in optical parametric oscillators

Optics Express, 2011
Ultrashort-pulse evolution inside a optical parametric oscillator is described by using a nonlinear-envelope-equation approach, eliminating the assumptions of fixed frequencies and a single χ((2)) process associated with conventional solutions based on the three coupled-amplitude equations.
openaire   +2 more sources

Thickness‐Dependent Infrared Emissivity of Ultrathin Freestanding MoSiN Nanocomposite Membranes

Advanced Optical Materials, EarlyView.
ABSTRACT Metals and dielectrics show opposite trends in thickness‐dependent infrared emissivity: metallic films exhibit a rise in emissivity below a critical thickness, while dielectric films show a corresponding decline. For applications demanding both high emissivity and mechanical strength in membranes with nanoscale thickness, combining these ...
Reethu Sebastian, Amrid Amnache, Nadi Braidy, Luc G. Fréchette   +3 more
wiley   +1 more source